Table 4.
Persuasive system design principles.
| Persuasive principles | WMa (n=11), n (%) | WLb (n=34), n (%) | All (N=45), n (%) | |
| Primary task support | ||||
| Self-monitoring | 11 (100) | 30 (88) | 41 (91) | |
| Tailoring | 11 (100) | 22 (65) | 33 (73) | |
| Personalization | 8 (73) | 16 (47) | 24 (53) | |
| Simulation | 8 (73) | 15 (44) | 23 (51) | |
| Reduction | 3 (27) | 4 (12) | 7 (16) | |
| Tunneling | 3 (27) | 5 (15) | 8 (18) | |
| Rehearsal | 2 (18) | 5 (15) | 7 (16) | |
| Dialog support | ||||
| Reminders | 9 (82) | 15 (44) | 24 (53) | |
| Suggestions | 7 (64) | 20 (59) | 27 (60) | |
| Reward | 6 (55) | 5 (15) | 11 (24) | |
| Praise | 4 (36) | 13 (38) | 17 (38) | |
| Social role | 1 (9) | 2 (6) | 3 (7) | |
| Similarity | 0 (0) | 2 (6) | 2 (4) | |
| Liking | 0 (0) | 1 (3) | 1 (2) | |
| Social support | ||||
| Social comparison | 2 (18) | 8 (24) | 10 (22) | |
| Social facilitation | 2 (18) | 3 (9) | 5 (11) | |
| Social learning | 1 (9) | 7 (21) | 8 (18) | |
| Cooperation | 1 (9) | 3 (9) | 4 (9) | |
| Recognition | 1 (9) | 3 (9) | 4 (9) | |
| Competition | 0 (0) | 4 (12) | 4 (9) | |
| Normative influence | 0 (0) | 1 (3) | 1 (2) | |
| Other | ||||
| Feedback | 11 (100) | 31 (91) | 42 (93) | |
| Goal setting | 10 (91) | 27 (79) | 37 (82) | |
| Social support | 7 (64) | 18 (53) | 25 (56) | |
aWM: weight loss maintenance interventions.
bWL: weight loss interventions.